Increasing between stitches (aka « Make one »)

This technique is my favorite for increasing stitches on a row. It's simple and practically invisible.

Slightly spread the needles to find the horizontal bar between the stitches on the left and right needles.

Insert the left needle under the horizontal bar, from front to back.

Insert the tip of the right needle from right to left in the new stitch formed by the strand. The right needle should be under the left needle, in the center of the stitch.

Knit the stitch: wrap the yarn around the tip of the right needle, counterclockwise, pull the tip of the right needle through the first stitch on the left needle, towards you, with the wrap yarn on it.

Carefully slip the left needle out of the first stitch. The new stitch is now on the right needle.